GT72S 6QE 980m upgrade to 1070?

Can anyone please verify with me that this can or cannot be done...it seems the gt72vr with the 1070 is the same as the gt72s but msi claims that the motherboard in the gt72vr is very different and the gt72s will not accept any 10 cards....but i mean...bringing the past into this, i would never have thought that the old as hell alienware m17x r4 that i had would accept a 970m or 980m when they started with the 7970m and 680m it needs modified drivers and all, but it still works...so is...

GT72S 6QE 980m upgrade to 1070?

GT72S 6QE 980m upgrade to 1070?